Evaluating Availability of Backend Logic in Enterprise Storage Systems

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Eftekhari, Reza | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42143 (19)
University: Sharif University of Technology
Department: Computer Engineering
Advisor(s): Asadi, Hossein
Abstract:
Data storage systems are an essential part of any Information Technology (IT) infrastructure. Unavailability of these systems can directly lead to service disruption to customers and can be very costly in enterprise applications such as ebanking, online reservation systems, and mobile services. Modeling availability of disk subsystem is a major step in design of data storage systems. Previous modeling techniques have mainly focused on data unavailability or data loss due to double or multiple disk failures. In this thesis, we present both simulation and analytical modeling techniques to investigate the effect of serviceability on the overall availability of disk subsystems. The proposed modeling technique discloses two major observations. First, a small percentage of human errors can significantly affect the overall availability of disk subsystems. Second, although some RAID configurations such as RAID1 theoretically provide higher level of availability compared to RAID5 configurations, this is no longer valid in the presence of human errors
Keywords:
Availability ; Data Storage ; Backend Logic ; Serviceability

No TOC